How do I date an onyx ring?

Dating relies on the mounting style, metal choice and hallmarks stamped inside the band. Art Deco pieces from the 1920s typically feature platinum geometric clusters, while 1960s examples often utilise heavy yellow gold. Assay office marks and date letters provide precise confirmation where stamped. Comparing the stone cut and secondary gems like marcasite or old-cut diamonds further narrows the decade of manufacture.

Is black onyx a natural stone?

Black onyx is a natural variety of chalcedony, a form of microcrystalline quartz. The stones found in antique and vintage settings are cut from mined mineral material. Lapidaries shape and polish the natural chalcedony to create the smooth tablets and cabochons seen in these rings and brooches.

How should I clean my vintage jewellery?

Cleaning requires warm soapy water and a soft brush to remove dust from behind settings. Avoid harsh chemical dips, particularly if the piece contains softer stones or glued elements. Patinated silver and antique gold benefit from gentle professional cleaning to preserve original surface characteristics.

What metals are paired with onyx?

Makers paired black onyx with platinum during the Art Deco period to create stark monochrome contrasts with diamonds. Yellow gold in 9ct and 18ct purities appears across Victorian, Edwardian and 1960s rings and necklaces. Silver and silver-plated settings occur frequently in antique brooches and filigree bracelets.